Assignment of resonances

Protein Isotopic Types of NMR Field Instrument Analysis 

Size Labeling Experiments Strength Time Time 

---

C NMR spectra 14 were recorded of cw-l,2-dimethylcyclohexane at the temperatures given the DEPT experiment at 223 K was also recorded in order to distinguish the CH multiplicities (CH and CHs positive, C// negative). Which assignments of resonances and what thermodynamic data can be deduced from these spectra ... 

The assignment of resonances in Table 14.2 results from summation of substituent effects as listed in Table 14.1. The data refer to conformer I for conformer II the C atoms pairs C-l/C-2, C-3/C-6, C-4/C-5 and C-7/C-8 change places. 

Figure 8. Calculated spin polarization density map in a Co/Cr—O—Li plane in LiCri/gCoy/gOz from DFT calculations."pj-ie positions of the Cr, Co, Li, and O ions are indicated. Li(l) has a Cr ion as its second cation coordination shell, while Li(2) has a Cr + ion in its first cation coordination shell. The Li spectra of LiCr/ioi-/32 x= 0.05 and 0.1) are shown along with the assignments of resonances corresponding to Li(l) and Li(2) local environments.

Figure 6. Assignment of resonances in C-13 NMR spectrum of low-molecular-weight polymer from 2,4,6-trichlorophenoxide...

D. Determining Amino Acid Composition and 145 Assignment of resonances... 

Many aspects of the dynamics of the action of enzymes of this size can be studied by NMR spectroscopy. New approaches allow study of proteins up to 30 kDa in size.519a Computer programs can analyze data and make automatic assignments of resonances.520 521... 

The heteronuclear multiple bond correlation (HMBC) experiment correlates proton nuclei with carbon nuclei that are separated by more than one bond. In Fig. FI. 4.7 the 37CH and 27Ch couplings dominate. Major applications related to anthocyanins include the assignment of resonances of nonprotonated carbon nuclei of the... 

As a complete structural elucidation of complex glycosidic compounds cannot be achieved by one-dimensional H-NMR spectra, which are provided by on-flow LC-NMR (13C-NMR data are still required for an unambiguous assignment of resonances), two approaches have proven to be effective in the case of asterosaponins in order to identify new compounds for a subsequent semi-preparative isolation ... 

Kriat, M., Confort-Gouny, S., Vion-Dury, J., Viout, P., Cozzone, P.J. (1992). Two-dimensional H NMR spectroscopy of normal and pathological human plasma Complete water suppression and further assignment of resonances. Biochimie, 74,913-918. 

---